oceans vocab

The continental shelf is a

• shallow offshore area moving from the edge of the continent toward the ocean.

• place to keep books about the continents.

• level area on the ocean floor.

• deep valley.

A bathymetric map shows

• where fish live.

• the metric measurement of a bath.

• the contours of the ocean floor and its geologic features.

• where bodies of water are on land.

The Earth's surface underneath the ocean is called

• the canyon.

• the ocean floor.

• a trench.

• hydrothermal vents.

Sea level is

• hard to define.

• measured above the high tide line.

• measured at the low tide line.

• the level of the sea's surface halfway between high and low tide.

The abyssal plain is the

• uneven part of the ocean floor marked by ridges.

• region of flat ocean floor.

• steep.

• is in the shallowest part of the ocean.

The mid-ocean ridge is where

• the ocean bottom is flat.

• extremely steep conditions exist.

• tectonic plates are moving away from each other and new seafloor is being created.

• deep valleys extend on the seafloor.

The deepest location in the Pacific Ocean is the

• Mariana Trench.

• continental slope.

• Juan de Fuca Ridge.

• San Andreas Fault.

A steep slope between the continent and the deep ocean is the

• continental divide.

• abyssal plain.

• continental slope.

• continental shelf.

A trench is a

• flat plain marked by ridges.

• deep valley that extends along the edges of the ocean.

• vent where sulfur and other chemicals are forced out.

• shallow offshore area.

Echosounding is one of two methods used to measure

• ocean depth.

• the length of whales.

• the sounds of boats.

• the length of a rope.